Structural and optical studies of pHEMA encapsulated ZnS:Ni2+ nanoparticles

[Display omitted] •The pHEMA capped ZnS:Ni2+ nanoparticles were synthesized.•The structural properties were confirmed by XRD and HR-TEM analysis.•Synthesized nanoparticles are in the size range of 3.59–4.36nm in size. In this study, ZnS:Ni2+ nanostructures have been synthesized through chemical prec...

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Published inSpectrochimica acta. Part A, Molecular and biomolecular spectroscopy Vol. 146; pp. 7 - 12
Main Authors Mohan, R., Sankarrajan, S., Thiruppathi, G.
Format Journal Article
LanguageEnglish
Published England Elsevier B.V 05.07.2015
Subjects
Band gap
HR-TEM
Nanoparticles - chemistry
Nickel - chemistry
pHEMA
Polyhydroxyethyl Methacrylate - chemistry
Spectrophotometry, Ultraviolet
Sulfides - chemistry
Zinc Compounds - chemistry
ZnS:Ni2+ nanoparticles
ZnS:Ni2+ nanoparticles
Band gap
pHEMA
HR-TEM
ZnS:Ni(2+) nanoparticles
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Summary:[Display omitted] •The pHEMA capped ZnS:Ni2+ nanoparticles were synthesized.•The structural properties were confirmed by XRD and HR-TEM analysis.•Synthesized nanoparticles are in the size range of 3.59–4.36nm in size. In this study, ZnS:Ni2+ nanostructures have been synthesized through chemical precipitation method using poly (2-hydroxyethyl methacrylate) (pHEMA) as capping agent. The structural, morphological and optical properties at different pHEMA concentration of ZnS:Ni2+ were studied by using X–ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), UV–Vis Spectroscopy (UV–Vis), fourier transform infrared spectroscopy (FT-IR), Photoluminescence (PL). The Average crystalline size of the nanoparticles was found to be in the range of ∼3.59–4.36nm. The surface morphological analysis reveals that the pHEMA capped nanoparticles showed homogeneous smooth surface. HR-TEM analysis reminds the original size of pHEMA capped nanoparticles. The band gap investigation revealed the size dependent of quantum confined nanoparticles. The immobilized nanoparticles in pHEMA matrix were verified by FT-IR studies. Novel luminescence properties have been observed for uncapped and pHEMA capped ZnS nanoparticles. The optimal capping concentration was successfully determined and its influence on photoluminescence behavior has been thoroughly analyzed.
ISSN:1386-1425
1873-3557
DOI:10.1016/j.saa.2015.02.089